UpWork (oDesk) & Elance PC Graphics Test Question & Answers
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Ques : Which of the following is/are basic phases of creating 3-D computer graphics?
Ans : 3-D modeling + 3-D rendering+Computer animation
Ques : Which of the following are common shading models?
Ans : flat + Gouraud +Phong
Ques : Which of the following statements about pixels are true? (Answer all that apply.)
Ans : A pixel has a dimension + Pixels are visible + A pixel can have coordinates.
Ques : Which of the following is/are typical steps in a graphical pipeline that converts three-dimensional objects for two-dimensional display or printing?
Ans : Rasterization +Viewport mapping and clipping
Ques : Which of the following colors belong to the standard four-color subtractive color model used in color printing or otherwise used to describe the printing process?
Ans : Magenta + Yellow
Ques : Which of the following colors belong to the most common three-color additive color model used in video displays or otherwise used to describe the physical concepts involved?
Ans : Red + Green
Ques : Which of the following file formats are popular vector-graphics formats?
Ans : EPS + SVG
Ques : What is meant by the term projection?
Ans : The process of mapping three dimensional images to two dimensions for display.
Ques : Which of the following raster graphics editors used to process digital graphics and photographs is/are open source, instead of being proprietary?
Ans : GIMP
Ques : Which one of the following graphics standard specifications is the main competitor to Microsoft's Direct3D (the 3D graphics API within DirectX)?
Ans : OpenGL
Ques : What does the term "jaggies" imply?
Ans : The stair-step effect seen along curves and edges in text or bit-mapped graphics.
Ques : What does the term "spline" imply?
Ans : In computer-aided design, a smooth curve that runs through a series of given points.
Ques : A modeling technique based upon a formal grammar whereby complex shapes are recursively generated from relatively simpleprocedures is termed as:
Ans : Graftal
Ques : he process of using an image described in a vector-graphics format and converting it into a bitmapped image as output on a display or printer, or as storage in a bitmapped file is known as
Ans : Rasterization
Ques : Which one of the color parameters measures how far away the color is from gray?
Ans : Hue
Ques : Which of the following techniques reduces the appearance of jagged edges of lines and edges in raster graphics?
Ans : Anti-aliasing
Ques : The process whereby a specific key color (often blue or green) within an image is made transparent when that image is mixed with another image is known as
Ans : Chroma keying
Ques : Which of the following graphic formats allow for animation?
Ans : GIF
Ques : A process in 2-D computer graphics whereby a closed vector path is used to mask (block) parts of an image is known as:
Ans : Clipping path
Ques : What is meant by the term crop?
Ans : Trimming or masking of photos, graphics, drawings, or illustrations
Ques : Which of the following graphical formats is/are always low-resolution (8-bit) bitmap graphics?
Ans : GIF
Ques : The vector-graphics package that was developed by Microsoft is:
Ans : Visio
Ques : _________ adds appropriately colored pixels to an image to make it seem as though more colors were present in the original.
Ans :Over print
Ques : What does the term "stroke weight" denote?
Ans : A term that illustration software uses to specify the thickness of a line when drawing a path.
Ques : The effect that occurs when an object nearer to the viewport in 3-D space blocks (masks) another, more distant object from view is called:
Ans : Depth
Ques : What is meant by the term rigging?
Ans : The process of linking a 3-D object, such as modeling a character, to its bone structure (skeletal animation).
Ques : A technique for achieving higher quality in lower-quality images is called __________. It takes advantage of an optical illusion to simulate 24-bit quality with 8-bit or 16-bit images:
Ans : Dithering
Ques : Which one of the following is a data structure used to organize objects within a space, which can be used in hidden-surface removal and in ray tracing?
Ans : Binary space partitioning (BSP) tree
Ques : What does the term "constraint" imply?
Ans : A rule or condition that must be followed regarding how the individual objects within an graphic can or cannot move, such as a wrist having to be attached to both a hand and an end of the lower arm.
Ques : What is meant by the term fog?
Ans : The mixing of an image with a fixed color that thickens as the image's pixels get further away from the viewpoint.
Ques : The first procedure in the OpenGL pipeline is to transform a 3-D point that is defined in the object coordinate system into the world coordinate system. This step has three possible transformations: rotation, scaling, and translation. Which one of those below is typically the correct order for executing these three transformations?
Ans : First rotation, then translation, and then scaling.
Ques : In computer animation, the entire frame is redrawn for each frame. What of the following would reduce flicker between frames?
Ans : Double buffering
Ques : Bitmapped graphics are also known as:
Ans : Raster graphics
Ques : Select from the following choices the one that most closely completes the Shannon sampling theorem: "The ideal samples of a continuous function contain all the information in the original function if and only if the continuous function is sampled at a frequency ________________ the highest frequency in the function."
Ans : Equal to
Ques : In computer graphics, when a line or object is moved where one end or point stays fixed in position is termed as:
Ans : Rubber banding
Ques : Which of the following best describes the term "vertex-vertex polygon mesh?"
Ans : The simplest mathematical representation of a mesh, but which is not widely used due to the lack of explicit face and edge information.
Ques : Which of the following polygon meshes is most commonly used in mesh modelling because its input data are more readily acceptable to modern hardware?
Ans : Vertex-face mesh
Ques : Which of the following rotation techniques gives the best results?
Ans : Quaternions
Ques : What is meant by the term gradient?
Ans : A color (or grayscale) fill that gradually blends from one color to another, perhaps from light to dark, for example.
Ques : The serial execution of the processes applied to geometric primitives (text, lines, polygons, curves, and surfaces) in a graphics package to produce two-dimensional output is called its
Ans : Rendering pipeline
Ques : Another term for the video output device for storing the graphic image as it is being formed and later used for displaying the image is:
Ans : Frame buffer
Ques : An image rendering process that builds images based upon the propagation of light rays and the effects of absorption, reflection, and refraction associated with the objects being scanned is termed as:
Ans : Ray tracing
Ques : Images based upon geometric elements, such as points, curves, and surfaces, that follow mathematical equations are called:
Ans : Vectors
Ques : What does the term "depth sort" imply?
Ans : An algorithm for creating a hidden-line drawing of polygon data sets by drawing the polygons from the most distant to the closest, in order.
Ques : What does the term "bezier" imply?
Ans : The term that describes one way that illustration software may create curves and shapes by using control points and control handles.
Ques :In computer graphics, a technique in which irregularities in shading are created for simulating rough textures is called:
Ans :Bump mapping
Ques : When considering illumination from light sources, which of the following types of light sources has the same intensity in all directions:
Ans : Point source
Ques : Which of the following is the most commonly used lighting model?
Ans : Phong
Ques : What does the term "flythrough" imply?
Ans : A type of animation in which the camera moves around a scene, rather than objects moving in front of a stationary camera.
Ques : The number of bits per pixel typically used for the color depth to be described as being a truecolor format is:
Ans : 24
Ques : In a 3-D graphics environment, the process of subdividing a surface into a mesh of smaller shapes that are easy to analyze is known as:
Ans : Tessellation
Ques : Which of the following types of reflection transmits light in all direction with the same energy?
Ans : Diffuse
Ques : Which of the following vector graphics editors used to process digital graphics is/are open source, instead of being proprietary?
Ans : Inkscape
Ques : The rendering of three-dimensional computer graphics often employs one or more approaches to model a complex four-dimensional mathematical function that defines the physical behavior of light at an opaque surface. This fundamental radiometric concept is known as the:
Ans : Bidirectional reflectance distribution function (BRDF)
Ques : What is meant by the term auto trace?
Ans : A programmed function in illustration software that converts raster graphics into vector graphics whereby paths are created along the edges of a scanned image.
Ques : Which one of the following formats would provide the least amount of pixelation when its dimensions are scaled (magnified) in size?
Ans : JPEG
Ques : What is meant by the term stroke?
Ans : A term that illustration software uses to describe the width of a line in a path.
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